Abstract
We propose a variant of the construction to describe the low-energy effective theory of heavy-light mesons, interacting with the lowest lying pseudoscalar and vector mesons. The heavy degrees of freedom are identified with the string low-energy modes, and are approximated near the world volume of light branes, by fundamental vector field valued in . The effective action follows from the reduction of the bulk Dirac-Born-Infeld and Chern-Simons actions, and is shown to exhibit both chiral and heavy-quark symmetry. The action interpolates continuously between the case with massless mesons, and the case with heavy-light mesons. The heavy-light meson radial spectrum is Regge-like. The one-pion and two-pion couplings to the heavy-light multiplets are evaluated. The partial widths for the charged decays are shown to be comparable to the recently reported full widths for both the charm and bottom mesons.
- Received 15 December 2016
DOI:https://doi.org/10.1103/PhysRevD.95.056022
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